Electronics Forum | Mon Nov 26 16:07:56 EST 2012 | jerlong
Greetings, Does anyone know where to find a tape and reel flatness specification? Looking at the EIA 481-B standard, there is no reference to the tape flatness (the images shown may "imply" flatness from one side of the tape to the other, However I
Electronics Forum | Tue Mar 14 05:02:35 EST 2000 | emmanuel
I am to implement PBGA, and i am looking for PCB surface finish informations. A lot of technical reports are specifing NiAu finishing because of flatness property. Because of leads shape, I though that BGA doesn't need flat pads like QFP. Is it false
Electronics Forum | Tue Mar 14 05:02:35 EST 2000 | emmanuel
I am to implement PBGA, and i am looking for PCB surface finish informations. A lot of technical reports are specifing NiAu finishing because of flatness property. Because of leads shape, I though that BGA doesn't need flat pads like QFP. Is it false
Electronics Forum | Fri Apr 01 04:51:53 EST 2005 | dougs
I think what Russ is getting at is that the granite table is used for it's flat surface to aid in measurement, the flat surface helps to measure heights very accuratly. If you add another surface on top of that then you lose what the granite surface
Electronics Forum | Thu Sep 23 11:50:54 EDT 2004 | JB
We are using a standard nozzle Once placed, the label is not flat, the ends of the label are slightly lifted on both ends. The label is .650 x .200 Have you guys run into a similar problem?
Electronics Forum | Mon Mar 28 19:58:26 EST 2005 | davef
We agree with Ken. What does your field meter tell you? Taking it a step further [erzit backward?], what is it about the measurement that requires the granite surface? Wouldn't an ESD protected bench top be as flat as needed for most gauging like
Electronics Forum | Thu Jul 06 12:06:12 EDT 2006 | pavel
Rob, do you have any tip on reliable supplier of "really flat" flexible pcb? We tried several but all with issues. Thank you. Pavel
Electronics Forum | Thu Jul 06 13:36:37 EDT 2006 | SWAG
We've had much trouble with flex circuits. As previously mentioned, you must have local fids for the board or the BGA itself (if panelized). Other troubles we experience are drilled holes for pinned connectors. Unless the PCB manufactur has some w
Electronics Forum | Mon Mar 26 16:58:53 EDT 2018 | solderingpro
Is there anything stopping you from replacing the flat belt solution to a continuous running steel roller chain conveyor? - From there (depending upon board temperature) you should be able to buffer your boards in a vertical buffer station if neede
Electronics Forum | Tue Jan 19 10:18:58 EST 2021 | grahamcooper22
Hi, try a low spitting cored wire...something like ALMIT SR-LA cored wire...or SR-LA SUPER...it eliminates flux/solder spitting during soldering.
